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+# unlimited.surf Transfer API Worker
+
+Cloudflare Worker adapter for `https://unlimited.surf` that exposes OpenAI-compatible `/v1/*` routes and Anthropic-compatible `/v1/messages` plus `/anthropic/*` aliases.
+
+## Deploy from GitHub with Cloudflare
+
+You can push this project to GitHub and let Cloudflare deploy it automatically on every commit.
+
+### 1. Push the project to GitHub
+
+Create a GitHub repository, then push this project directory to it. Do not commit your unlimited.surf API key.
+
+### 2. Connect the GitHub repository in Cloudflare
+
+1. Open the Cloudflare Dashboard.
+2. Go to `Workers & Pages`.
+3. Choose `Create`.
+4. Choose `Import a repository` or `Connect to Git`.
+5. Authorize Cloudflare to access your GitHub account if prompted.
+6. Select the repository that contains this project.
+7. Set the project root directory to `/` unless you put this project in a subdirectory.
+
+### 3. Configure build and deploy settings
+
+Use these settings in the Cloudflare deploy form:
+
+```text
+Framework preset: None
+Build command: npm install
+Deploy command: npx wrangler deploy
+Root directory: /
+Wrangler config: wrangler.toml
+```
+
+If Cloudflare shows only one command field for Workers, use:
+
+```bash
+npm install && npx wrangler deploy
+```
+
+### 4. Add the API key as a Cloudflare secret
+
+After the Worker project is created, add this secret in the Worker settings:
+
+```text
+UNLIMITED_SURF_API_KEY=<your unlimited.surf key>
+```
+
+In the Cloudflare Dashboard this is usually under:
+
+```text
+Workers & Pages -> your Worker -> Settings -> Variables -> Secrets
+```
+
+Keep the key as a secret. Do not put it in `wrangler.toml`, `README.md`, or GitHub repository files.
+
+### 5. Deploy and verify
+
+Trigger a deploy from Cloudflare or push a new commit to GitHub. After deployment, open:
+
+```text
+https://<your-worker>.workers.dev/health
+```
+
+You should see a JSON response with `"ok": true`.
+
+Then test the OpenAI-compatible route:
+
+```bash
+curl https://<your-worker>.workers.dev/v1/models
+```
+
+And test the Anthropic setup route:
+
+```bash
+curl https://<your-worker>.workers.dev/v1/setup
+```
+
+## Manual deploy with Wrangler
+
+You can also deploy directly from your local machine:
+
+```powershell
+npm install -g wrangler
+wrangler login
+wrangler secret put UNLIMITED_SURF_API_KEY
+wrangler deploy
+```
+
+Use your unlimited.surf key as the secret value. You can also omit the secret and pass a key per request with `Authorization: Bearer <key>` or `x-api-key: <key>`.
+
+## OpenAI-compatible routes
+
+Base URL:
+
+```text
+https://<your-worker>.workers.dev/v1
+```
+
+Supported routes:
+
+- `GET /v1/models`
+- `POST /v1/chat/completions`
+- `POST /v1/responses`
+- `POST /v1/search`
+- `POST /v1/merge`
+- `GET /v1/key`, `GET /v1/usage`
+- `POST /v1/files`
+- `POST /v1/files/extract`, `POST /v1/attachments/extract`
+- `GET /v1/setup`, `GET /v1/codex`, `GET /v1/mcp`
+
+Example:
+
+```bash
+curl https://<your-worker>.workers.dev/v1/chat/completions \
+  -H "Authorization: Bearer <key>" \
+  -H "Content-Type: application/json" \
+  -d '{"model":"gateway-gpt-5","messages":[{"role":"user","content":"Hello"}],"stream":true}'
+```
+
+## Anthropic-compatible routes
+
+Base URL:
+
+```text
+https://<your-worker>.workers.dev
+```
+
+Supported routes:
+
+- `POST /v1/messages`
+- `GET /v1/models`
+- `POST /anthropic/v1/messages`
+- `GET /anthropic/v1/models`
+- `GET /v1/setup`, `GET /v1/codex`, `GET /v1/mcp`
+
+Claude Code PowerShell example:
+
+```powershell
+$env:ANTHROPIC_BASE_URL = "https://<your-worker>.workers.dev"
+$env:ANTHROPIC_AUTH_TOKEN = "<key>"
+$env:ANTHROPIC_API_KEY = "<key>"
+$env:ANTHROPIC_MODEL = "claude-opus-4-7-20260101"
+claude
+```
+
+## Feature mapping
+
+- Chat maps to upstream `POST /api/chat`.
+- Web Search maps to upstream `POST /api/search` when you call `/v1/search`, pass `web_search_options`, pass `query`, or include a web search tool.
+- Merge AI maps to upstream `POST /api/merge` when you call `/v1/merge`, pass `merge: true`, or pass `models` with 2+ model IDs.
+- Models maps to upstream `GET /api/models` with a fallback catalog if the upstream call fails.
+- Files maps upload/extract requests to upstream `POST /api/attachments/extract`; persistent file storage is not implemented unless you add KV/R2.
+- Codex, Agent Setup, and MCP are exposed as setup/info endpoints. MCP servers still run in the client or IDE; this Worker only provides the model endpoint.
+- Embeddings, audio, and images return `501` because unlimited.surf does not expose those APIs in the provided docs.
+
+## Upstream raw proxy
+
+Any `/api/*` request is forwarded to unlimited.surf with the configured key, so the original API remains available through the Worker.